<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>donut-spinner</title>
    <style>
        .donut {
            display: inline-block;
            border: 4px solid rgba(0,0,0,.1);
            width: 30px;
            height: 30px;
            border-radius: 50%;
            border-left-color: #7983ff;
            animation: donut-spin 1.2s linear infinite;
        }
        @keyframes donut-spin {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }
    </style>
</head>
<body>
    <div class="donut"></div>
</body>
</html>